SAMPLE GAS DILUTION UNIT FOR DILUTION AT A MULTIPLICITY OF RATIOS

摘要

The present invention provides an apparatus that will selectively dilute a continuous sample of gas with a diluting gas at a multiplicity of predetermined ratios and will deliver the combination of sample gas and diluting gas to analyzing or measuring equipment at concentrations that are in the most effective range of said equipment. The sample gas and diluting gas are separately delivered to a valve means that will combine the sample gas and the diluting gas in a multiplicity of preselected ratios. The valve means may be actuated to change the ratio in which the sample gas and the diluting gas are combined. The combined sample gas and diluting gas are transmitted to the analyzing or measuring equipment.